I am trying to emboss an image and this is the method I have. For some reason, when I click the emboss button (which calls the following method), nothing happens to my image. Can you see what could be wrong in my method?
Emboss method:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | public BufferedImage emboss(BufferedImage bi) { int width = bi.getWidth(); int height = bi.getHeight(); BufferedImage dst; dst = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); for (int i = 0; i < height; i++) for (int j = 0; j < width; j++) { int upperLeft = 0; int lowerRight = 0; if (i > 0 && j > 0) { upperLeft = bi.getRGB(j - 1, i - 1); } if (i < height - 1 && j < width - 1) { lowerRight = bi.getRGB(j + 1, i + 1); } int redDiff = ((lowerRight >> 16) & 255) - ((upperLeft >> 16) & 255); int greenDiff = ((lowerRight >> 8) & 255) - ((upperLeft >> 8) & 255); int blueDiff = (lowerRight & 255) - (upperLeft & 255); int diff = redDiff; if (Math.abs(greenDiff) > Math.abs(diff)) { diff = greenDiff; } if (Math.abs(blueDiff) > Math.abs(diff)) { diff = blueDiff; } int grayColor = 128 + diff; if (grayColor > 255) { grayColor = 255; } else if (grayColor < 0) { grayColor = 0; } int newColor = (grayColor << 16) + (grayColor << 8) + grayColor; bi.setRGB(j, i, newColor); } return dst; } |
